Technically, an image is a function that maps acontinuousdomain, e.g.a box, to intensities such as (R, G, B).To store it on computer memory, an image isdiscretizedto an arrayarray[H][W], where each elementarray[i][j]is apixel.How does discretization work? How does a discrete pixel relate to the abstract notion of the underlying continuous image?These basic questions play an important role in computer graphics & computer vision algorithms.This article discusses these low-level details, and how they affect our CNN models and deep learning libraries.If you ever wonder which resize function to use
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